We love our Roombas! Yes we have more than one ... one for upstairs and one for the main level. We have tried other robot vacuum brands, but the Roomba seems to work the best as far as helping clean with two kids and dogs.
One of the least pleasant parts of owning pets is shedding season. (Which, in the case of our pets, seems to be every season.) For many years we struggled to stay on top of all of the fur that covers the ground and somehow finds its way onto tables and counters.
Our Roomba runs at least once a week now and frees up our time to do other things. Our model (the Roomba 690) connects to an app which allows us to start it even when we're not home, and allows it to tell us when it inevitably gets stuck somewhere every few months. Despite the occasional problems (which are easily resolved), our Roomba has already saved us countless hours of time we would've had to spend cleaning.